CN101917054B - With the direct current varied-frequency air conditioner of solar cell - Google Patents
With the direct current varied-frequency air conditioner of solar cell Download PDFInfo
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- CN101917054B CN101917054B CN201010230977.4A CN201010230977A CN101917054B CN 101917054 B CN101917054 B CN 101917054B CN 201010230977 A CN201010230977 A CN 201010230977A CN 101917054 B CN101917054 B CN 101917054B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
- F24F2005/0067—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy with photovoltaic panels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/50—Energy storage in industry with an added climate change mitigation effect
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Air Conditioning Control Device (AREA)
- Inverter Devices (AREA)
- Photovoltaic Devices (AREA)
Abstract
A kind of direct current varied-frequency air conditioner with solar cell, comprise solar cell, direct current varied-frequency air conditioner, be connected to solar powered controller between solar cell and direct current varied-frequency air conditioner and utility grid, direct current varied-frequency air conditioner comprises AC-DC rectifier and direct current varied-frequency air conditioner circuit, and solar powered controller comprises DC-high pressure DC inverter and solar energy peak power output MPPT control unit; The power output of solar energy commercial power grid solar cell, the low-voltage DC that solar cell exports is changed into high voltage direct current by control DC-high pressure DC inverter, and directly power supply is to direct current varied-frequency air conditioner circuit.Utility grid supplies power to direct current varied-frequency air conditioner circuit in parallel with solar powered controller after AC-DC rectifier.The present invention has that cost of manufacture is low, energy-conserving and environment-protective, minimizing is to environmental impact, flexible operation, Energy Efficiency Ratio feature high and applied widely.
Description
Technical field
The present invention relates to a kind of air conditioner, particularly a kind of direct current varied-frequency air conditioner with solar cell.
Background technology
The existing solar air conditioner driven by solar cell, see accompanying drawing 1, managed by solar powered controller 9 pairs of solar cells 1, storage battery 10 and DC-high pressure DC inverter 11 are powered, then is converted into the alternating voltage the same with civil power through high pressure DC-50 or 60Hz high pressure AC transducer 13.Simultaneously, whether the electricity that solar powered controller 9 detects solar cell 1 and storage battery 10 is enough, control electronic switch 14, when the electricity of solar cell 1 and storage battery 10 is all inadequate, control electronic switch 14 is switched to utility grid 5 and powers to direct current varied-frequency air conditioner 15, otherwise, be switched to high pressure DC-50 or 60Hz high pressure AC transducer 13 is powered to direct current varied-frequency air conditioner 15.
, there is following shortcoming in the solar air conditioner of this mode:
1) current convertible frequency air-conditioner be all 50Hz or 60Hz the same as civil power low frequency electricity, as Chinese patent literature CN 2665593Y discloses a kind of solar energy and electric main duplicate supply air-conditioning system on December 22nd, 2004, it comprises air-conditioning system body and power supply thereof, power supply comprises solar panel and controller thereof, the inversion boosting transformer be connected with power line with controller, with controller, inversion boosting transformer, the control board that batteries connects with wire, the change over switch be connected with wire with the output of AC mains and inversion boosting transformer, the output of change over switch is connected with air-conditioning system body.First this solar energy and electric main duplicate supply air-conditioning system convert solar energy into direct current and are stored in storage battery, be changed to alternating current by directly circulating and be supplied to air-conditioning system after boosting again during use, the direct current 24 ~ 48V of this storage battery is transformed into civil power and need have passed through: DC-high pressure DC inverter 11, high pressure DC-50 or 60Hz high pressure AC transducer 13 totally two processes transform.These two transfer processes all can the energy of loss about 5%, thus reduces the service efficiency of solar energy.
2) inside of the direct current varied-frequency air conditioner 15 on market comprises AC-DC rectifier 8 and direct current varied-frequency air conditioner circuit 7.After external AC electrical power source is come in, power need to again after the AC-DC rectifier 8 of air conditioner inside the direct current varied-frequency air conditioner circuit 7 of direct current varied-frequency air conditioner and use.The air conditioner power supply circuits of this mode, due to the existence of AC-DC rectifier 8, add the loss of power supply.
Summary of the invention
Object of the present invention aim to provide a kind of simple and reasonable, cost of manufacture is low, energy-conserving and environment-protective, conversion efficiency are high, reduce direct current varied-frequency air conditioner to environmental impact, flexible operation, Energy Efficiency Ratio band solar cell high, applied widely, to overcome weak point of the prior art.
By a kind of direct current varied-frequency air conditioner with solar cell that this object designs, comprise solar cell, direct current varied-frequency air conditioner, be connected to solar powered controller between solar cell and direct current varied-frequency air conditioner and utility grid, direct current varied-frequency air conditioner comprises AC-DC rectifier and direct current varied-frequency air conditioner circuit, it is characterized in that solar powered controller comprises DC-high pressure DC inverter and solar energy peak power output MPPT control unit; The power output of solar energy commercial power grid solar cell, the low-voltage DC that solar cell exports is changed into high voltage direct current by control DC-high pressure DC inverter, and directly power supply is to direct current varied-frequency air conditioner circuit.
Described utility grid supplies power to direct current varied-frequency air conditioner circuit in parallel with solar powered controller after AC-DC rectifier.
The low-voltage DC that described solar cell exports is 15V ~ 42V.
Described direct current varied-frequency air conditioner circuit comprises direct current varied-frequency air conditioner interior circuit and the outdoor circuit of direct current varied-frequency air conditioner, and direct current varied-frequency air conditioner interior circuit comprises main control MCU, display unit, temperature sensor, Switching Power Supply, DC fan, indoor EMC circuit and communication unit; The outdoor circuit of direct current varied-frequency air conditioner comprises main control MCU, DC fan, Switching Power Supply, temperature sensor, communication unit, display unit, variable frequency control and driver element and frequency-changeable compressor; The output of the DC-high pressure DC inverter in solar powered controller with after the utility grid of EMC circuit and AC-DC rectifier is in parallel, then is connected with direct current varied-frequency air conditioner interior circuit and the outdoor circuit of direct current varied-frequency air conditioner respectively.
Described solar powered controller comprises solar powered controller main control MCU, isolation communication unit, high-voltage power voltage sampling unit, high voltage source abnormal protection control unit, DC-high pressure DC inverter, current detecting unit and voltage detection unit, wherein, high-voltage power voltage sampling unit is connected between the output of DC-high pressure DC inverter and one end of isolation communication unit, and the other end of isolation communication unit is connected with solar powered controller main control MCU; One end of high voltage source abnormal protection control unit and the output parallel connection of DC-high pressure DC inverter, the other end of high voltage source abnormal protection control unit is connected with solar powered controller main control MCU; The output of DC-high pressure DC inverter is connected with the outdoor DC high-voltage power supply through over commutation, and the input of DC-high pressure DC inverter is connected with one end of current detecting unit; Current detecting unit is connected between DC-high pressure DC inverter and solar cell, and the other end of current detecting unit is connected with solar powered controller main control MCU; One end of voltage detection unit and solar cell parallel connection, the other end of voltage detection unit is connected with solar powered controller main control MCU; Solar powered controller main control MCU comprises solar energy peak power output MPPT control unit, communication unit, background process algorithm unit, abnormal protection algorithm unit, electric voltage exception Processing Algorithm unit, DC-high pressure DC inversion algorithm unit and storage battery management algorithm unit.
Described solar powered controller also comprises storage battery and accumulator cell charging and discharging administrative unit, one end of accumulator cell charging and discharging administrative unit is connected in parallel on the output of solar cell, the other end of accumulator cell charging and discharging administrative unit is connected with storage battery, and the control end of accumulator cell charging and discharging administrative unit is connected with solar powered controller.
Described direct current varied-frequency air conditioner also comprises high pressure DC-50 or 60Hz high pressure AC transducer, and high pressure DC-50 or 60Hz high pressure AC transducer are connected between DC-high pressure DC inverter in solar powered controller and utility grid.
The present invention is according to the control circui feature of DC frequency converting air-conditioner, adopt the transfer process of DC-DC, the low-voltage DC maximal efficiency exported by solar cell by solar energy peak power output MPPT control unit control DC-high pressure DC inverter changes into high voltage direct current, reduce " high pressure DC-50 or 60Hz high pressure AC transducer, AC-DC rectifier, accumulator cell charging and discharging manager " three intermediate link losses in transfer process in the past, improve efficiency.
Occur in order to avoid causing the situation that can not drive air-conditioning not because of solar cell power output, and add electric main, by exporting high voltage direct current after the AC-DC rectifier rectification of direct current varied-frequency air conditioner inside, due to solar cell export supply direct current direct current varied-frequency air conditioner be also direct current, and direct current itself does not have the problem of phase place compatibility, therefore can simply the control circuit of direct-flow frequency converting of the direct current parallel connection supply direct current behind the direct current of solar cell output and commercial power rectification be used, thus simplify the parallel operation circuit of civil power and solar-electricity, and decrease electronic switch, reduce cost of manufacture.
The present invention is specially adapted to the office factory site of turning on the aircondition a daytime, can make full use of the energy that solar cell produces.
The present invention meets the developing direction of national energy-saving environmental protection, have simple and reasonable, cost of manufacture is low, energy-conserving and environment-protective, minimizing is to environmental impact, flexible operation, Energy Efficiency Ratio feature high and applied widely.
Accompanying drawing explanation
Fig. 1 is the block diagram of the direct current varied-frequency air conditioner that existing solar cell drives.
Fig. 2 is functional-block diagram of the present invention.
Fig. 3 is the functional-block diagram of the embodiment of the present invention one.
Fig. 4 is the enforcement theory diagram of solar powered controller 2.
Fig. 5 is the electrical connection schematic diagram of the AC-DC rectifier of direct current varied-frequency air conditioner inside, direct current varied-frequency air conditioner circuit and DC-high pressure DC inverter.
Fig. 6 is the electrical connection schematic diagram of the first DC-high pressure DC inverter.
Fig. 7 is the electrical connection schematic diagram of the second DC-high pressure DC inverter.
Fig. 8 is the functional-block diagram of embodiment two with battery system.
Fig. 9 be embodiment three when air conditioner does not run, by the functional-block diagram of unnecessary electricity supply civil power.
In figure: 1 is solar cell, 2 is solar powered controller, 3 is DC-high pressure DC inverter, 4 is solar energy peak power output MPPT control unit, 5 is utility grid, 6 is direct current varied-frequency air conditioner, 7 is direct current varied-frequency air conditioner circuit, 8 is AC-DC rectifier, 10 is storage battery, 20 is direct current varied-frequency air conditioner interior circuit, 21 is the outdoor circuit of direct current varied-frequency air conditioner, 23 is EMC circuit, 31 is accumulator cell charging and discharging administrative unit, 32 is high pressure DC-50 or 60Hz high pressure AC transducer, 34 is AC-DC rectifier circuit, 35 is the first DC-high pressure DC inverter circuit, 36 is the second DC-high pressure DC inverter circuit, 37 is PWM driver element, 40 is solar powered controller main control MCU, 41 is isolation communication unit, 42 is high-voltage power voltage sampling unit, 44 is current detecting unit, 45 is communication unit, 46 is background process algorithm unit, 47 is abnormal protection algorithm unit, 48 is electric voltage exception Processing Algorithm unit, 49 is DC-high pressure DC inversion algorithm unit, 50 is high voltage source abnormal protection control unit, 51 is voltage detection unit, 52 is storage battery management algorithm unit.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
See Fig. 2, a kind of direct current varied-frequency air conditioner with solar cell, comprise solar cell 1, direct current varied-frequency air conditioner 6, be connected to solar powered controller 2 between solar cell 1 and direct current varied-frequency air conditioner 6 and utility grid 5, direct current varied-frequency air conditioner 6 comprises AC-DC rectifier 8 and direct current varied-frequency air conditioner circuit 7, and solar powered controller 2 comprises DC-high pressure DC inverter 3 and solar energy peak power output MPPT control unit 4; Solar energy peak power output MPPT control unit 4 monitors the power output of solar cell 1, and the low-voltage DC that solar cell 1 exports is changed into high voltage direct current by control DC-high pressure DC inverter 3, and directly power supply is to direct current varied-frequency air conditioner circuit 7.The low-voltage DC that solar cell 1 exports is 15V ~ 42V.
Utility grid 5 supplies power to direct current varied-frequency air conditioner circuit 7 in parallel with solar powered controller 2 after AC-DC rectifier 8.
The voltage and current that the built-in solar energy peak power output MPPT control unit 4 of solar powered controller 2 exports for detecting solar cell 1, pass through tailor-made algorithm, the power that the conversion of control DC-high pressure DC inverter 3 exports, the direct current varied-frequency air conditioner circuit 7 in supply direct current varied-frequency air conditioner 6 uses.
Solar cell 1 in the present embodiment uses common solar panel; It is 15 ~ 42V, 0 ~ 240W that one piece of solar panel exports usually; Can 1 ~ 10 piece of solar panel parallel connection use.
Direct current varied-frequency air conditioner 6 in the present embodiment has two road power inlet, and the delivery outlet of solar powered controller 2 is connected to the first via input port of direct current varied-frequency air conditioner 6, and electric main electrical network 5 is connected to the second input port, tunnel of direct current varied-frequency air conditioner 6.First via power inlet direct current varied-frequency air conditioner circuit 7, second tunnel be directly connected in direct current varied-frequency air conditioner 6 is connected to direct current varied-frequency air conditioner circuit 7 after being connected to an AC-DC rectifier 8.At ordinary times under solar cell 1 provides the sufficient situation of electricity, direct current varied-frequency air conditioner circuit 7 in direct current varied-frequency air conditioner 6 is powered by solar powered controller 2, under solar cell 1 provides the not enough situation of electricity, insufficient section is provided by utility grid 5, uses with the direct current varied-frequency air conditioner circuit met in direct current varied-frequency air conditioner 6.To reach the electricity making full use of solar energy and produce, reduce the consumption to civil power.
Embodiment one
See Fig. 3, it is the functional-block diagram of the embodiment of the present invention one.Direct current varied-frequency air conditioner with solar cell comprises solar cell 1, solar powered controller 2 and direct current varied-frequency air conditioner 6.
Solar powered controller 2 is connected between the first via power interface of solar cell 1 and direct current varied-frequency air conditioner 6.Utility grid 5 is connected to the second road power interface of direct current varied-frequency air conditioner 6.
The principle of common full DC variable frequency air conditioner controller used by a complete set of controller of direct current varied-frequency air conditioner 6, comprise direct current varied-frequency air conditioner interior circuit 20, direct current varied-frequency air conditioner outdoor circuit 21, AC-DC rectifier 8 and EMC circuit 23, whole connected mode is shown in Fig. 3.
Direct current varied-frequency air conditioner interior circuit 20 includes indoor main control MCU, display unit, temperature sensor, Switching Power Supply, DC fan, indoor EMC circuit, the communication unit carrying out communication with direct current varied-frequency air conditioner outdoor section and other functional units etc.
The outdoor circuit 21 of direct current varied-frequency air conditioner includes outdoor main control MCU, DC fan, Switching Power Supply, temperature sensor, the communication unit carrying out communication with direct current varied-frequency air conditioner indoor section, display unit, variable frequency control and driver element, frequency-changeable compressor and other functional units etc.
What the outdoor circuit 21 of direct current varied-frequency air conditioner interior circuit 20, direct current varied-frequency air conditioner used is all DC power supply, DC-high pressure DC inverter 3 by solar powered controller 2 inside is powered, utility grid 5 is after known EMC circuit 23, AC-DC rectifier 8 simultaneously, and output-parallel is to the output of DC-high pressure DC inverter 3.In other words, the output of the DC-high pressure DC inverter 3 in solar powered controller 2 with after the utility grid 5 of EMC circuit 23 and AC-DC rectifier 8 is in parallel, then is connected with direct current varied-frequency air conditioner interior circuit 20 and the outdoor circuit 21 of direct current varied-frequency air conditioner respectively.
See Fig. 4, it is the enforcement theory diagram of solar powered controller 2.Solar powered controller 2 comprises solar powered controller main control MCU 40, isolation communication unit 41, high-voltage power voltage sampling unit 42, high voltage source abnormal protection control unit 50, DC-high pressure DC inverter 3, current detecting unit 44 and voltage detection unit 51.Concrete connected mode is: high-voltage power voltage sampling unit 42 is connected between the output of DC-high pressure DC inverter 3 and one end of isolation communication unit 41, and the other end of isolation communication unit 41 is connected with solar powered controller main control MCU 40; One end of high voltage source abnormal protection control unit 50 and the output parallel connection of DC-high pressure DC inverter 3, the other end of high voltage source abnormal protection control unit 50 is connected with solar powered controller main control MCU 40; The output (+P and-N end) of DC-high pressure DC inverter 3 is connected with the outdoor DC high-voltage power supply 43 through over commutation, and the input of DC-high pressure DC inverter 3 is connected with one end of current detecting unit 44; Current detecting unit 44 is connected between DC-high pressure DC inverter 3 and solar cell 1, and the other end of current detecting unit 44 is connected with solar powered controller main control MCU 40; One end of voltage detection unit 51 and solar cell 1 parallel connection, the other end of voltage detection unit 51 is connected with solar powered controller main control MCU 40.
The inside of solar powered controller main control MCU 40 comprises solar energy peak power output MPPT control unit 4, communication unit 45, background process algorithm unit 46, abnormal protection algorithm unit 47, electric voltage exception Processing Algorithm unit 48, DC-high pressure DC inversion algorithm unit 49 and storage battery management algorithm unit 52.
See Fig. 5, it is the electrical connection schematic diagram of a kind of AC-DC rectifier of direct current varied-frequency air conditioner inside, direct current varied-frequency air conditioner circuit and DC-high pressure DC inverter.Wherein, AC-DC rectifier circuit 34 is the known AC-DC rectifier circuits in market, utility grid 5 is connected to the input of AC-DC rectifier circuit 34 through known EMC circuit 23, through AC-DC rectifier circuit 34 rectification input high voltage direct current, be connected with the output of DC-high pressure DC inverter 3, the input of direct current varied-frequency air conditioner circuit 7 respectively.AC-DC rectifier circuit 34 comprises rectifier bridge D5, filter capacitor C2, filter capacitor C3, filter L3 and electrochemical capacitor E1.
See Fig. 6 and Fig. 7, it is the electrical connection schematic diagram of two kinds of DC-high pressure DC inverters.
Fig. 6 is the catenation principle figure of known the first DC-high pressure DC inverter circuit 35, pwm signal is produced by solar powered controller main control MCU 40 control PWM driver element 37, driving switch pipe Q7, switching tube Q8, switching tube Q9 and switching tube Q10, switching tube Q7 and switching tube Q8 is connected to one end of isolation boosting transformer T, switching tube Q9 and switching tube Q10 is connected to the other end of isolation boosting transformer T, by isolation boosting transformer T by switching tube Q7, switching tube Q8, pwm signal on switching tube Q9 and switching tube Q10 is converted to High Level AC Voltage, again by the bridge rectifier of diode D1 ~ D4 composition, convert out high voltage direct current.High voltage direct current after diode D1 ~ D4 rectification after inductance L 1, electric capacity C1 and electrochemical capacitor E1 filtering, becomes stable high voltage direct current again, exports and is connected to+P ,-N point.
Fig. 7 is the catenation principle figure of known the second DC-high pressure DC inverter circuit 36, it is isolation boosting transformer isolation boosting transformer T being changed into the different step-up ratio output of band on the basis of Fig. 8, the coil control end of relay R L1 and relay R L2 is connected respectively to PWM driver element 37, by PWM driver element 37 control relay RL1 and relay R L2, according to the power consumption size of solar panel input voltage and direct current varied-frequency air conditioner, switch different step-up ratios, to realize maximum conversion efficiency.
Embodiment two
See Fig. 8, it is the theory diagram of band battery system of the present invention.In the present embodiment two, user can when direct current varied-frequency air conditioner 6 run, and the energy storage produced by solar cell 1 is in storage battery 10.In the process that direct current varied-frequency air conditioner 6 runs, if the electricity that solar cell 1 produces is not enough to provide direct current varied-frequency air conditioner 6 to run completely, electricity supply direct current varied-frequency air conditioner 6 can be increased by storage battery 10 and run.
The present embodiment two comprises solar cell 1, direct current varied-frequency air conditioner 6, is connected to solar powered controller 2, accumulator cell charging and discharging administrative unit 31, storage battery 10 and utility grid 5 between solar cell 1 and direct current varied-frequency air conditioner 6.Fig. 5 is shown in concrete connection: the catenation principle figure of solar cell 1, direct current varied-frequency air conditioner 6, solar powered controller 2, utility grid 5 can see the connection description of Fig. 2.
Accumulator cell charging and discharging administrative unit 31 adopts known circuit, and its one end is connected in parallel on the output of solar cell 1, and its other end is connected with storage battery 10, and the control end of accumulator cell charging and discharging administrative unit 31 is connected with solar powered controller 2.Now, the storage battery management algorithm unit 52 being positioned at solar powered controller 2 realizes storage battery 10 management of charging and discharging.Direct current varied-frequency air conditioner circuit 7 comprises direct current varied-frequency air conditioner interior circuit, direct current varied-frequency air conditioner outdoor circuit, AC-DC rectifier and EMC circuit.
The present embodiment two due to the current life of storage battery limited, within usual 2 ~ 3 years, will damage, need frequently to change storage battery, and accumulator cell charging and discharging manager 31 pairs of storage batterys 10 of solar powered controller 2 inside charge, management of discharging also can cause energy loss.
All the other are not stated part and see the first embodiment, no longer repeat.
Embodiment three
See Fig. 9, for the present invention is not when direct current varied-frequency air conditioner 6 runs, can by the functional-block diagram of unnecessary electricity supply civil power.The present embodiment three is on the above embodiments two basis, increase high pressure DC-50 or 60Hz high pressure AC transducer 32, when direct current varied-frequency air conditioner 6 does not run, unnecessary electricity can be supplied to utility grid 5, realize generator function.High pressure DC-50 herein or 60Hz high pressure AC transducer 32 are known high pressure DC-high pressure AC converter circuit, are connected between the DC-high pressure DC inverter 3 of solar powered controller 2 inside and utility grid 5.Direct current varied-frequency air conditioner circuit 7 comprises direct current varied-frequency air conditioner interior circuit, direct current varied-frequency air conditioner outdoor circuit, AC-DC rectifier and EMC circuit.
All the other are not stated part and see the first embodiment, no longer repeat.
All professional persons convert the present invention or pro forma conversion through circuit structure, do not have substantial innovation all to belong to protection scope of the present invention.
Claims (3)
1. the direct current varied-frequency air conditioner with solar cell, comprise solar cell (1), direct current varied-frequency air conditioner (6), be connected to solar powered controller (2) between solar cell (1) and direct current varied-frequency air conditioner (6) and utility grid (5), direct current varied-frequency air conditioner (6) comprises AC-DC rectifier (8) and direct current varied-frequency air conditioner circuit (7), it is characterized in that solar powered controller (2) comprises DC-high pressure DC transducer (3) and solar energy peak power output MPPT control unit (4), the power output of solar energy peak power output MPPT control unit (4) monitoring solar cell (1), the low-voltage DC that solar cell (1) exports is changed into high voltage direct current by control DC-high pressure DC transducer (3), direct power supply is to direct current varied-frequency air conditioner circuit (7), described utility grid (5) supplies power to direct current varied-frequency air conditioner circuit (7) in parallel with solar powered controller (2) after AC-DC rectifier (8), the low-voltage DC that described solar cell (1) exports is 15V ~ 42V, described direct current varied-frequency air conditioner circuit (7) comprises direct current varied-frequency air conditioner interior circuit (20) and the outdoor circuit (21) of direct current varied-frequency air conditioner, direct current varied-frequency air conditioner interior circuit (20) comprises main control MCU, display unit, temperature sensor, Switching Power Supply, DC fan, indoor EMC circuit and communication unit, the outdoor circuit (21) of direct current varied-frequency air conditioner comprises main control MCU, DC fan, Switching Power Supply, temperature sensor, communication unit, display unit, variable frequency control and driver element and frequency-changeable compressor, the output of DC-high pressure DC transducer (3) in solar powered controller (2) is with after the utility grid (5) of EMC circuit (23) and AC-DC rectifier (8) is in parallel, be connected with direct current varied-frequency air conditioner interior circuit (20) and the outdoor circuit (21) of direct current varied-frequency air conditioner respectively again
Described solar powered controller (2) comprises solar powered controller main control MCU (40), isolation communication unit (41), high-voltage power voltage sampling unit (42), high voltage source abnormal protection control unit (50), DC-high pressure DC transducer (3), current detecting unit (44) and voltage detection unit (51), wherein, high-voltage power voltage sampling unit (42) is connected between the output of DC-high pressure DC transducer (3) and one end of isolation communication unit (41), the other end of isolation communication unit (41) is connected with solar powered controller main control MCU (40), one end of high voltage source abnormal protection control unit (50) and the output parallel connection of DC-high pressure DC transducer (3), the other end of high voltage source abnormal protection control unit (50) is connected with solar powered controller main control MCU (40), the output of DC-high pressure DC transducer (3) is connected with the outdoor DC high-voltage power supply (43) through over commutation, and the input of DC-high pressure DC transducer (3) is connected with one end of current detecting unit (44), current detecting unit (44) is connected between DC-high pressure DC transducer (3) and solar cell (1), and the other end of current detecting unit (44) is connected with solar powered controller main control MCU (40), one end of voltage detection unit (51) and solar cell (1) parallel connection, the other end of voltage detection unit (51) is connected with solar powered controller main control MCU (40), solar powered controller main control MCU (40) comprises solar energy peak power output MPPT control unit (4), communication unit (45), background process algorithm unit (46), abnormal protection algorithm unit (47), electric voltage exception Processing Algorithm unit (48), DC-high pressure DC inversion algorithm unit (49) and storage battery management algorithm unit (52).
2. the direct current varied-frequency air conditioner of band solar cell according to claim 1, it is characterized in that described direct current varied-frequency air conditioner also comprises storage battery (10) and accumulator cell charging and discharging administrative unit (31), one end of accumulator cell charging and discharging administrative unit (31) is connected in parallel on the output of solar cell (1), the other end of accumulator cell charging and discharging administrative unit (31) is connected with storage battery (10), and the control end of accumulator cell charging and discharging administrative unit (31) is connected with solar powered controller (2).
3. the direct current varied-frequency air conditioner of band solar cell according to claim 2, it is characterized in that described direct current varied-frequency air conditioner also comprises high pressure DC-50 or 60Hz high pressure AC transducer (32), high pressure DC-50 or 60Hz high pressure AC transducer (32) and is connected to and is positioned between DC-high pressure DC transducer (3) of solar powered controller (2) and utility grid (5).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010230977.4A CN101917054B (en) | 2010-02-03 | 2010-06-30 | With the direct current varied-frequency air conditioner of solar cell |
| PCT/CN2010/078619 WO2011095020A1 (en) | 2010-02-03 | 2010-11-11 | Direct current variable-frequency air conditioner with solar cell |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201019050034.0 | 2010-02-03 | ||
| CN201019050034A CN101806490A (en) | 2010-02-03 | 2010-02-03 | Frequency-conversion air conditioner with solar cell |
| CN2010190500340 | 2010-02-03 | ||
| CN201010230977.4A CN101917054B (en) | 2010-02-03 | 2010-06-30 | With the direct current varied-frequency air conditioner of solar cell |
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| Publication Number | Publication Date |
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| CN101917054A CN101917054A (en) | 2010-12-15 |
| CN101917054B true CN101917054B (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201019050034A Pending CN101806490A (en) | 2010-02-03 | 2010-02-03 | Frequency-conversion air conditioner with solar cell |
| CN201010230977.4A Active CN101917054B (en) | 2010-02-03 | 2010-06-30 | With the direct current varied-frequency air conditioner of solar cell |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201019050034A Pending CN101806490A (en) | 2010-02-03 | 2010-02-03 | Frequency-conversion air conditioner with solar cell |
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| Country | Link |
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| CN (2) | CN101806490A (en) |
| WO (1) | WO2011095020A1 (en) |
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| CN101806490A (en) | 2010-08-18 |
| CN101917054A (en) | 2010-12-15 |
| WO2011095020A1 (en) | 2011-08-11 |
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